package com.myq.server.config.security.compenent;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @program:yeb
 * @author: xxx
 * @Time: 2023/4/23  21:13
 * @description: Jwt授权过滤器
 */
public class JwtAuthencationTokenFilter extends OncePerRequestFilter {
    @Value("${jwt.tokenHeader}")
    private String tokenHeader;
    @Value("${jwt.tokenHead}")
    private String tokenHead;
    @Autowired
    private JwtTokenUtil jwtTokenUtil;
    @Autowired
    private UserDetailsService userDetailsService;
    @Override
    protected void doFilterInternal(HttpServletRequest request,
                                    HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        String authHeader = request.getHeader(tokenHeader);


        //存在token
        if (authHeader!=null && authHeader.startsWith(tokenHead)){


            String authToken = authHeader.substring(tokenHead.length());
            String username = jwtTokenUtil.getUsernameFromToken(authToken);
            if (username!=null&& SecurityContextHolder.getContext().getAuthentication()==null){
                //登录
                UserDetails userDetails = userDetailsService.loadUserByUsername(username);
                //验证token是否有效，重新设值用户对象
                if (jwtTokenUtil.validateToken(authToken,userDetails)){
                    UsernamePasswordAuthenticationToken authenticationToken
                            = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());

                    authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                    SecurityContextHolder.getContext().setAuthentication(authenticationToken);
                }
            }
        }
        filterChain.doFilter(request,response);

    }
}
